From: Thorsten Kukuk <kukuk@suse.de>
To: libc-hacker@sources.redhat.com
Subject: NSS modules and errno if key not found
Date: Sat, 27 Mar 2004 17:53:00 -0000 [thread overview]
Message-ID: <20040326221341.GA14167@suse.de> (raw)
Hi,
I found a problem today when debugging some NSS releated problems.
If somebody calls getgrnam_r (or any other reentrant NSS function),
the return value of the function will be errno if the status is not
NSS_STATUS_SUCCESS.
But in the case of NSS_STATUS_NOTFOUND, no NSS module sets errno,
so the return value is a random value, but should be zero.
Who should set errno in this case? Should all NSS modules set
errno? Or should we explicit return 0 in the getXXbyYY_r functions
for NSS_STATUS_NOTFOUND?
Testcase:
#include <grp.h>
#include <errno.h>
int main ()
{
char buffer[8048];
struct group *result = (void *)12, gbuf;
errno = 211;
int ret = getgrnam_r ("notexistent", &gbuf, buffer, sizeof (buffer),
&result);
printf ("errno=%d, ret=%d, result=%p\n", errno, ret, result);
return 0;
}
--
Thorsten Kukuk http://www.suse.de/~kukuk/ kukuk@suse.de
SuSE Linux AG Maxfeldstr. 5 D-90409 Nuernberg
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Key fingerprint = A368 676B 5E1B 3E46 CFCE 2D97 F8FD 4E23 56C6 FB4B
next reply other threads:[~2004-03-26 22:13 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-27 17:53 Thorsten Kukuk [this message]
2004-03-29 20:16 ` Thorsten Kukuk
2004-03-30 0:01 ` Ulrich Drepper
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